Island



( ModeL) e. LEMA-IN. COTTON GIN RIB.-

No. 510,073. Patented "De0.5, 1893.

UNITED STATES,

PATENT OFFICE.

GEORGE LEMAIN, OF PAWTIIOKET, RHODE ISLAND.

COTTON-GIN RIB.

SPECIFICATION forming part of Letters Patent No. 510,073, dated December 5, 1893.

Application filed August 28, 1893. Serial No. 484,215 (No model.)

To all whom it may concern.-

Be it known that I, GEORGE LEMAIN, a citizen of the United States, residing at Pawtucket, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Cotton-Gin Ribs,

of which the following is a specification, reference being bad therein to the accompanying drawings, in which Figure 1 is a perspective view of a gin-rib provided with my improvement, and Fig. 2 is a longitudinal sectional view of that part of the rib provided with my device.

The object of this invention is to provide each rib in a saw-gin with a removable wearing plate, which can be readily removed and renewed, when worn, without the use of tools, and which shall form practically a part of the rib when in place and which shall not add materially to the cost of the rib, as more fully hereinafter appears.

In the drawings a designates the rib, which is of the usual construction, excepting that it is provided across its face, at the point where the saw-teeth pass between the ribs, with a transverse recess in which is fitted the wearing-plate I), this plate being set in flush with the surface and side edges of the rib. The upper and lower edges of plate I) are beveled downwardly and inwardly and fit closely against the correspondingly beveled walls of the recess, and the lower edge has formed on it a downwardly-extending lug b, which has its lower edge beveled and fits in a correspondingly beveled recess in the rib. A sliding-bolt 0 works in a longitudinal recess in the upper edge of the wearing-plate and is.

adapted to automatically spring upward into a bolt-hole formed in the adjacent beveled edge of the rib-recess, the actuating-spring being confined in the recess behind the bolt and the bolt and spring being guided by a pin 0 formed on the rear end of the bolt and working in a smaller recess 0 behind the main bolt-recess. A pin d is secured in the bolt and extended out through a slot d in the wearing plate and provided with an operating-knob d" which works on the surface of the Wearing-plate and is sufficiently long to cover the slot and extend across the joint between the plate and rib and has its surface beveled downwardly and inwardly to a thin edge. It will be observed that the wearing bolt locked. This wearing plate is very simple and is therefore easily and cheaply constructed, and it is also easily removed and replaced by a new one when Worn, thereby avoiding the necessity and expense of putting new ribs in a machine when they become worn.

The device forms practically a part of the rib when in place and is not liable to become loosened from use and does not require the use of tools for removal and replacement.

Having thus fully described my invention, what I claim is- 1. In combination, a gin-rib provided with a transverse recess in its face, a plate fitting in said recess and carrying a spring-actuated bolt at one end, said bolt being adapted to enter a recess in the rib and lock the platein place, substantially as described.

2. In combination, a gin-rib provided with a transverse recess in its face, a plate fitting in said recess and carrying a spring-actuated bolt at one end, said bolt being adapted to enter a recess in the rib and lock the plate in place, and an operating-knob connected to said bolt, this knob working on the front of the plate and having its face beveled, sub stantially as described.

3. A gin-rib provided with a recess across its face, a wearing-plate fitting therein and provided with a'lug at one end, entering a recess in the rib, and a spring-actuated bolt at its other end, and means for operating the bolt, substantially as described.

In testimony whereof Iaflix my signature in 100 presence of two witnesses.

GEORGE LEMAIN.

lVitnesses:

CLARENCE A. ALDRICH, EDWIN P. ALLEN. 

